Warranty & Tech Support - 2 Years Hassle-Free Warranty and Free Lifetime Tech Support. Supported Video Resolutions - 1080P (60Hz & 30HZ)/ 1080i/ 720p/ 576p/ 576i/ 480p/ 480i; Supported Audio Formats - PCM 2.0, Does Not Support: Dolby Digital and DTS; USB 2.0. USB Switch: Supports 2 Modes - USB Synchronization Mode: USB devices work on 4 computers at the same time (ex. One Keyboard and Mouse control all 4 computers at the same time); Switch Mode: USB devices work on either one computer once a time. Switch Method: Keyboard - Hot keys. Package comes with 4psc USB A to USB B cables (Use between computers and USB switch). 5 Display Modes provide extra diversities on the display options. Transmit HDMI signal for up to 100 feet without losing picture quality. Plug & Play, No driver needed. Allows 4 different HDMI devices (computer, laptop, DVD player, console etc.) display on the same screen (TV, monitor, projector) at the same time. Also allows 4 computers to use 4 USB devices simultaneously: Mouse and Keyboard.